Tracking this diagnosis for someone you care for? Eleplan keeps diagnoses, medications and appointments in one plan.
Start free with EleplanQ04
Non-billableOther congenital malformations of brain
Q04 is the ICD-10-CM code for Other congenital malformations of brain. It is a non-billable category code — use a more specific child code such as Q04.0 for billing.
- Status
- Header (non-billable)
- Chapter
- Q00-Q99
- Subcodes
- 9
- Edition
- FY2026
Q00-Q99 Congenital malformations, deformations and chromosomal abnormalities
What this means — in plain language
MedlinePlus · NIHMost brain malformations begin long before a baby is born. Something damages the developing nervous system or causes it to develop abnormally. Sometimes it's a genetic problem. In other cases, exposure to certain medicines , infections , or radiation during pregnancy interferes with brain development. Parts of the brain may be missing, abnormally small or large, or not fully developed. Treatment depends upon the…
Read more about Brain Malformations at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Conditions mapped to this code
MedlinePlus · NIHPlain-language health-topic references grounded in MedlinePlus (NIH/NLM).
140 rare diseases filed under this code
Orphanet · INSERMICD-10 has no distinct code for most rare diseases, so many are filed under the nearest available one. This code is shared — showing 12 of 140.
Orphadata Science: Free access data from Orphanet. © INSERM 1999. 4 of these are exact ICD-10 matches; the rest are broader-bucket mappings.
Frequently asked questions
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
Look up another ICD-10 code or condition